@article{article, title  = {{The theory of classification part 6: The subtyping inquisition}},

 url = {{}},

 year = {{2003}},

 month = {{1}},

 author = {{Simons AJH}},

 doi = {{10.5381/jot.2003.2.2.c2}},

 volume = {{2}},

 journal = {{Journal of Object Technology}},

 issue = {{2}},

 pages = {{17-26}},

 note = {{Accessed on 2025/11/29}}}